Fitlet3 How to use GPS features of Sierra EM7421 modem
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Revision as of 08:48, 8 May 2023 by Andreym (Talk | contribs) (Created page with "* This application note applies to fitlet3 configured with Sierra EM7421 cellular modem. * It explains how to use the GPS feature {| class="wikitable" border="1" | File:EM...")
- This application note applies to fitlet3 configured with Sierra EM7421 cellular modem.
- It explains how to use the GPS feature
To get the GPS working via the GNSS RF connector:
1. Unplug the connector from the Auxiliary RF connector
2. Connect it to GNSS RF connector.
To get the GPS working via the Auxiliary RF connector (Diversity antenna) - change the modem configuration:
1. Unlock password protected AT commands
echo -ne 'AT!ENTERCND="A710"\r\n' > /dev/ttyUSB3
2. Set the autostart for GPS
echo -ne 'AT!GPSAUTOSTART=1\r\n' > /dev/ttyUSB3
3. Set the GPS antenna to the aux port (diversity), where is the antenna connected, because by default: the "gnss rf" port is selected in the modem configuration.
echo -ne 'AT!CUSTOM="GPSSEL",1\r\n' > /dev/ttyUSB3
